Composition comprising lactic acid bacteria for use in the preventive and/or curative treatment of recurrent cystitis

ABSTRACT

A composition comprising lactic bacteria for use in the preventive and/or curative treatment of bacterial infections, which cause urinary tract and/or bladder inflammations is described. The composition is in particular for the treatment of recurrent cystitis.

CROSS REFERENCE TO RELATED APPLICATIONS

The present application is a divisional application of U.S. application Ser. No. 14/891,306 filed on Nov. 13, 2015 incorporated herein by reference in its entirety, which is the U.S. national stage of International Application PCT/IB2014/000731, filed internationally on May 14, 2014, which, in turn, claims priority to Italian Patent Application No. MI2013A000793 filed on May 14, 2013.

FIELD

The present invention relates to a composition comprising lactic bacteria for use in the preventive and/or curative treatment of bacterial infections and related inflammations of the urinary tract and/or bladder, in particular for the treatment of recurrent cystitis.

BACKGROUND

Pathogenic bacteria belonging to the species Escherichia coli are known to be able to adhere to the epithelial cell surface of the urinary bladder (urothelium). For this and other reasons, it is known that pathogenic bacteria belonging to the species Escherichia coli are responsible for more than 80% of the cases of bacterial infections, which cause bladder inflammations (cystitis). Cystitis, in particular recurrent cystitis, causes discomfort and pain, at times even in acute form.

SUMMARY

The present invention describes a composition, supplement product, medical device or a food composition comprising at least one strain of bacteria having both a specific antibacterial activity against E. coli and an anti-inflammatory activity with stimulation of the Interleukin IL-4 and Interleukin IL-10 production and at least one strain of bacteria having an oxalate-degrading activity. The composition herein described can be used in the preventive and/or curative treatment of bacterial infections and related inflammations of the urinary tract and/or bladder.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows the quantification of E. coli (ATCC 8739, ATCC 10536, ATCC 35218, ATCC 25922) inhibition by the strain Lactobacillus plantarum LMG P-21021 -LP01.

FIG. 2 shows cytokine profile of ten independent experiments.

FIG. 3 shows the quantification of E. coli (ATCC 8739, ATCC 10536, ATCC 35218, ATCC 25922) inhibition by the strain Lactobacillus plantarum LMG P-21020 -LP02.

DETAILED DESCRIPTION

In view of the above, there is a need to intervene both against bacterial infections caused by E. coli and the related inflammations of the urinary tract and/or bladder.

Therefore, there is a need to efficiently intervene against pathogens belonging to the species Escherichia coli both through a barrier effect, in order to reduce the adhesion of the pathogen itself to the epithelial cells of the urinary bladder, and through an anti-E. coli activity, for hindering the development and proliferation of the pathogen itself. In particular, there is a need to have a treatment for preventing and/or curing cystitis, in particular recurrent cystitis, by adopting a treatment compatible with the physiological habitat and which is well tolerated so that to be administered for a continuous use without side effects. Finally, there is a need to have a natural and effective barrier effect, in the case of both an acute episode and possible relapses, which continues over the time for ensuring a long-term protection and assuring a long-lasting effective preventive and/or curative treatment.

The Applicant, following to an extended and intense research activity, gave a response to the above-cited needs. In fact, the Applicant, after testing and studying many strains of lactic bacteria, succeeded to select only some of them. The selected strains have, at the same time, an activity against the pathogenic bacteria E. coli which cause infections and a high anti-inflammatory activity since they are strains of bacteria producing interleukin 4 (IL-4) and interleukin 10 (IL-10).

It is an object of the present invention a composition for use in the preventive and/or curative treatment of bacterial infections and related inflammations of the urinary tract and/or bladder, having the characteristics as disclosed in the appended claim.

Said composition is preferably for use in the preventive and/or curative treatment of cystitis, in particular recurrent cystitis.

By preventive and/or curative treatment is meant to also include circumstances wherein the urinary tract and/or bladder inflammation is limited, reduced or attenuated, which improve the health conditions of the subject being treated.

Preferred embodiments of the present invention are contemplated in the following detailed description.

In the context of the present invention by composition is meant to include a pharmaceutical composition, or a supplement product or a medical device or a food composition.

It is an object of the present invention a composition comprising a mixture of bacteria which comprises or, alternatively, consists of: strains of bacteria having both a specific antibacterial activity against E. coli and an anti-inflammatory activity with stimulation of the Interleukin IL-4 and Interleukin IL-10 production, and strains of bacteria having an oxalate-degrading activity.

It is an object of the present invention a composition wherein said mixture comprises or, alternatively, consists of: at least a strain of bacteria having both a specific antibacterial activity against E. coli and an anti-inflammatory activity with stimulation of the Interleukin IL-4 and Interleukin IL-10 production, combined with at least a strain of bacteria having an oxalate-degrading activity.

It is an object of the present invention a composition comprising or, alternatively, consisting of a mixture of bacteria which comprises or, alternatively, consists of at least a strain of bacteria selected from the group comprising the strain Lactobacillus plantarum LMG P-21021 -LP01 and the strain Lactobacillus plantarum LMG P-21020 -LP02, combined with at least a strain of bacteria selected from the group comprising the strain Lactobacillus paracasei DSM 24243 -LPC09, the strain Lactobacillus gasseri DSM 18299 -LGS01, the strain Lactobacillus gasseri DSM 18300 -LGS02, the strain Lactobacillus acidophilus DSM 24303 -LA07 and the strain Lactobacillus acidophilus DSM 21717 -LA02, for use in the preventive and/or curative treatment of bacterial infections and related inflammations of the urinary tract and/or bladder.

The strain Lactobacillus plantarum LMG P-21021 -LP01 was deposited by Mofin Srl Company on 16 Oct. 2001 at the BCCM LMG center.

The strain Lactobacillus plantarum LMG P-21020 -LP02 was deposited by Mofin Srl Company on 16 Oct. 2001 at the BCCM LMG center.

The strain Lactobacillus paracasei DSM 24243 -LPC09 was deposited by Probiotical S.p.A. Company on 23 Nov. 2010 at the DSMZ center.

The strain Lactobacillus gasseri DSM 18299 -LGS01 was deposited by Anidral Srl Company, now Probiotical S.p.A., on 24 May 2006 at the DSMZ center.

The strain Lactobacillus gasseri DSM 18300 -LGS02 was deposited by Anidral Srl Company, now Probiotical S.p.A., on 24 May 2006 at the DSMZ center.

The strain Lactobacillus acidophilus DSM 24303 -LA07 was deposited by Probiotical S.p.A. Company on 23 Nov. 2010 at the DSMZ center.

The strain Lactobacillus acidophilus DSM 21717 -LA02 was deposited by Probiotical S.p.A. Company on 6 Aug. 2008 at the DSMZ center.

In a preferred embodiment, the composition comprises or, alternatively, consists of a mixture of bacteria which comprises or, alternatively, consists of Lactobacillus plantarum LMG P-21021 -LP01 combined with at least a strain of bacteria selected from the group comprising the strain Lactobacillus paracasei DSM 24243 -LPC09, the strain Lactobacillus gasseri DSM 18299 -LGS01, the strain Lactobacillus gasseri DSM 18300 -LGS02, the strain Lactobacillus acidophilus DSM 24303 -LA07 and the strain Lactobacillus acidophilus DSM 21717 -LA02; preferably in a weight ratio comprised from 4:1 to 3:1; even more preferably 1:1. Said compositions are for use in the preventive and/or curative treatment of cystitis, in particular of recurrent cystitis.

In another preferred embodiment, the composition comprises or, alternatively, consists of a mixture of bacteria which comprises or, alternatively, consists of Lactobacillus plantarum LMG P-21020 -LP02 combined with at least a strain of bacteria selected from the group comprising the strain Lactobacillus paracasei DSM 24243 -LPC09, the strain Lactobacillus gasseri DSM 18299 LGS01, the strain Lactobacillus gasseri DSM 18300 -LGS02, the strain Lactobacillus acidophilus DSM 24303 -LA07 and the strain Lactobacillus acidophilus DSM 21717 -LA02; preferably in a weight ratio comprised from 4:1 to 3:1; even more preferably 1:1. Preferably, said compositions are for use in the preventive and/or curative treatment of cystitis, in particular of recurrent cystitis.

Said compositions can further comprise a cranberry extract, preferably a dry cranberry extract, and/or can further comprise a D-mannose.

In another preferred embodiment, said compositions can comprise, in addition to the strains of bacteria described above and the amounts disclosed above, a cranberry extract, preferably a dry cranberry extract; and/or can comprise a D-mannose; and/or can comprise a plant gum and/or a plant gelatin. The plant gum and/or the plant gelatin is preferably selected from the group comprising a tannate or a gelatin tannate, an alginate, a xyloglucan or xylogel, a guar gum, a tara gum, an acacia, carob, oat, bamboo fiber, citrus fruit fibers and glucomannans. Preferably it is a guar gum. The selected plant gum and/or plant gelatin reduces the bacterial translocation of E. coli from the intestine to the bladder.

Preferably, all the above-described compositions can further comprise a fiber with prebiotic activity selected from inulin, fructo-oligosaccharides (FOS), galacto- and trans-galacto-oligosaccharides (GOS and TOS), gluco-oligosaccharides (GOSα), xylo-oligosaccharides, (XOS), chitosan-oligosaccharides (COS), soy-oligosaccharides (SOS), isomalto-oligosaccharides (IMOS), resistant starch, pectins, psyllium, arabino-galactans, gluco-mannans and galacto-mannans.

In a preferred embodiment, the composition of the present invention comprises or, alternatively, consists of:

(i) a mixture of bacteria which comprises or, alternatively, consists of Lactobacillus plantarum LMG P-21021 -LP01 and Lactobacillus paracasei DSM 24243 -LPC09; preferably in a weight ratio comprised from 4:1 to 3:1; even more preferably 1:1, (ii) a cranberry extract, preferably a dry cranberry extract, a D-mannose and a guar gum; preferably in a weight ratio 1:1:1, and (iii) a fructo-oligosaccharide FOS; preferably in a weight ratio 5:1 relative to the weight of cranberry extract.

In another preferred embodiment, the composition of the present invention comprises or, alternatively, consists of:

(i) a mixture of bacteria which comprises or, alternatively, consists of Lactobacillus plantarum LMG P-21020 -LP02 and Lactobacillus acidophilus DSM 21717 -LA02; preferably in a weight ratio comprised from 4:1 to 3:1; even more preferably 1:1, (ii) a cranberry extract, preferably a dry cranberry extract, a D-mannose and a guar gum; preferably in a weight ratio 1:1:1, and (iii) a fructo-oligosaccharide FOS; preferably in a weight ratio 5:1 relative to the weight of cranberry extract.

The composition of the present invention due to the presence of a cranberry extract, preferably a dry extract (trade name PACran®, a dry extract of US cranberry (Cranberry Vaccinium macrocarpon—extract)) is able to establishing a physical-mechanical hindrance against the Escherichia coli adhesion to the epithelial cell surface of the urinary bladder (urothelium).

The activity of said cranberry extract is mediated, in particular, by the proanthocyanidin subfraction with the trimers and tetramers characterized by A-type bonds which compete with the adhesins located on the P-type fimbriae (FimH, mannose-sensitive) which uses E. coli for mediating its anchoring to the epithelial cells through specific receptors, thereby hindering in a physical-mechanical manner its adhesion and subsequent bladder colonization.

Advantageously, the strain of bacteria Lactobacillus plantarum LMG P-21021 -LP01 and/or the strain of bacteria Lactobacillus plantarum LMG P-21020 -LP02, in the presence of the cranberry extract, are able to complement and enhance the physical-mechanical hindrance exerted by the cranberry extract as described above, through a barrier-type action even at intestinal level against E. coli. These two strains of bacteria Lactobacillus plantarum LMG P-21021 -LP01 and Lactobacillus plantarum LMG P-21020 -LP02 have a proven E. coli activity and a high anti-inflammatory activity since they produce interleukin 4 (IL-4) and interleukin 10 (IL-10).

Preferably, the strain of bacteria Lactobacillus plantarum LMG P-21021 -LP01 and/or the strain of bacteria Lactobacillus plantarum LMG P-21020 -LP02 are in an amount comprised from 1 to 3 billions of viable cells/dose, even more preferably from 2 to 2.5 billions of viable cells/dose.

The strains of bacteria of the present invention exert a marked barrier-type action against potential Gram-negative pathogens, with particular reference to the species Escherichia coli and a high anti-inflammatory activity since they produce interleukin 4 (IL-4) and interleukin 10 (IL-10).

Advantageously, the strains of bacteria Lactobacillus paracasei DSM 24243 -LPC09, Lactobacillus gasseri DSM 18299 -LGS01, Lactobacillus gasseri DSM 18300 -LGS02, Lactobacillus acidophilus DSM 24303 -LA07 and Lactobacillus acidophilus DSM 21717 -LA02 are able to carry out a protective action since they exert a barrier effect to the oxalates contained in the cranberry extract, preferably in the form of dry extract. The metabolization of these oxalate molecules prevents the intestinal accumulation and the systemic absorption thereof, thus avoiding the establishment and the maintenance of an inflammatory condition of the intestine, particularly disadvantageous in the occurrence of diverticula.

The strains of bacteria Lactobacillus paracasei DSM 24243 -LPC09, Lactobacillus gasseri DSM 18299 -LGS01, Lactobacillus gasseri DSM 18300 -LGS02, Lactobacillus acidophilus DSM 24303 -LA07 and Lactobacillus acidophilus DSM 21717 -LA02 metabolize the oxalates and, therefore, have a proved anti-renal gravel activity. These strains of bacteria prevent the renal accumulation of oxalates thus avoiding the renal gravel formation and, thereby, impeding the establishment and the maintenance of an inflammatory condition of the urinary tract particularly disadvantageous for the health status of a bladder subjected to recurrent cystitis.

The percentage of oxalate degradation is as follows:

-   -   Lactobacillus paracasei DSM 24243 -LPC09, greater than 68%;     -   Lactobacillus gasseri DSM 18299 -LGS01, greater than 68%;     -   Lactobacillus gasseri DSM 18300 -LGS02, greater than 66%;     -   Lactobacillus acidophilus DSM 24303 -LA07, greater than 54%;     -   Lactobacillus acidophilus DSM 21717 -LA02, greater than 50%.

The presence of strains of bacteria degrading oxalates in the composition of the present invention is also important for the following reason. The cranberry extract contains a fair oxalate amount. A prolonged use of cranberry extract could lead to renal gravel formation, which may force the subject to suspend the use thereof. The use of strains degrading oxalates of the present invention prevents this drawback allowing a prolonged administration of cranberry extract.

Preferably, the strains of bacteria Lactobacillus paracasei DSM 24243 -LPC09, Lactobacillus gasseri DSM 18299 -LGS01, Lactobacillus gasseri DSM 18300 -LGS02, Lactobacillus acidophilus DSM 24303 -LA07 and Lactobacillus acidophilus DSM 21717 -LA02 are in an amount comprised from 0.5 to 2 billions of viable cells/dose, even more preferably from 1 to 1.5 billions of viable cells/dose.

The composition further comprises D-mannose, which enhances the barrier effect exerted by the cranberry extract. In particular, D-mannose in a simple sugar, namely a monosaccharide which, once absorbed in the blood circulation, is neither transformed in glycogen nor exploited by the organism, with a subsequent removal by the kidney and achievement of high concentrations in the urinary tract wherein it will exert its hindering effects against the bacteria being present. In fact, D-mannose has a high affinity for mannose-sensitive lectins, typical proteins of cell membranes of the human organism used by many bacteria for adhering to the urinary mucosae. Additionally, D-mannose also exerts a mechanical action, which inhibits the formation of biofilms that many bacteria are able to produce with the dual purpose of protecting from our immune system elements and from antibiotics, as well as more effectively adhering to the mucosal surface.

The composition of the present invention can further comprise at least a gum, among those described above, which decreases the bacterial translocation of E. coli from the intestine to the bladder. The gum can be a plant gum and/or a plant gelatin. The plant gum and/or the plant gelatin is preferably selected from the group comprising a tannate or a gelatin tannate, an alginate, a xyloglucan or xylogel, a guar gum, a tara gum, an acacia, carob, oat, bamboo fiber, citrus fruit fibers and glucomannans. Preferably it is a guar gum. The selected plant gum and/or plant gelatin reduces the bacterial translocation of E. coli from the intestine to the bladder. Preferably it is a guar gum. The guar gum exerts a mechanical action at intestinal level, hindering the adhesion of Escherichia coli and other pathogens to the mucosa of the organ, thus reducing their translocation through the intestinal wall and the subsequent risk of infection of adjacent organs. In particular, the gum acts by forming a hydrophilic gel, which evenly distributes over the mucosal surface, restoring the physiological barrier effect of this organ, which typically results impaired in the event of intestinal infections by Escherichia coli or other pathogens.

In addition, the composition of the present invention further comprises a fiber with prebiotic activity (prebiotic fiber), which can be selected from inulin, fructo-oligosaccharides (FOS), galacto- and trans-galacto-oligosaccharides (GOS and TOS), gluco-oligosaccharides (GOSα), xylo-oligosaccharides, (XOS), chitosan-oligosaccharides (COS), soy-oligosaccharides (SOS), isomalto-oligosaccharides (IMOS), resistant starch, pectins, psyllium, arabino-galactans, gluco-mannans and galacto-mannans. Preferably, it is selected from short chain fructo-oligosaccharides (FOS sc) or galactooligosaccharides GOS which contributes to the growing and replication of the bacterial strains existing in the composition.

The composition of the present invention can further comprise excipients selected from natural flavors, anti-caking agents such as silicon dioxide, black carrot anthocyanins, sucralose.

The mixture of bacteria has a bacterial load comprised from 1×10⁸ to 1×10¹² CFU/g of mixture. The composition of the present invention which contains said mixture of bacteria has a bacterial load of about 5×10⁷-5×10⁹ CFU/composition.

It is an object of the present invention a composition comprising a mixture, which comprises or, alternatively, consists of:

-   -   (a) a strain of bacterium Lactobacillus plantarum LP01 (LMG         P-21021) and/or     -   (b) a strain of bacterium Lactobacillus paracasei LPC09 (DSM         24243); said composition further comprises:     -   (c) a specific muco-adhesive gelling complex, comprised of EPS,         exopolysaccharides of bacterial origin (produced by         Streptococcus thermophilus ST10 DSM 25246 and tara gum, a         polysaccharide of plant origin. Said gelling complex is able to         establish a mechanical barrier effect throughout the         gastro-intestinal tract. Said composition further contains (d) a         specific dry extract of US cranberry (Cranberry—PACran®) and (e)         a suitable amount of D-mannose (composition).

Due to the presence of cranberry and D-mannose the composition is able to establishing a hindering action of physical-mechanical type against the adhesion of Escherichia coli to the epithelial cell surface of the urinary bladder, responsible for most of the cases of bacterial infections which cause inflammations of this organ (cystitis).

Due to the presence of the specific ingredient PACran®, a dry extract of US cranberry (Cranberry, Vaccinium macrocarpon), the composition is able to establish a natural physical-mechanical hindrance against the adhesion of Escherichia coli to the epithelial cell surface of bladder and urinary tract. Its main activity is related to the proanthocyanidin subfraction (phytochemical component of fruits) containing trace elements which compete with the adhesins located on the P-type fimbriae (Fim H, mannose-sensitive) which uses E. coli for mediating its anchoring to the epithelial cells, thereby hindering in a physical-mechanical manner its adhesion and subsequent colonization of urinary tract and bladder.

Such a barrier is further enhanced due to the present of D-mannose, a simple sugar. UPEC bacteria, by binding the D-mannose molecules through the P-type fimbriae, remain in free form in the urine and, thus, are more easily removed by urination. Finally, D-mannose exerts a mechanical action inhibiting the formation of biofilms that many bacteria are able to produce. After exerting its hindering effect, D-mannose is able to bind the cells of the bladder mucosa (of which is constitutive part) restoring a protective layer similar to the physiological one comprised of glycosaminoglycans, which is usually damaged by recurrent inflammations.

The composition further comprises a suitable amount of tara gum which, due to its gelling and muco-adhesive properties, is capable to form a hydrogel within few minutes after ingestion, by virtue of its thixotropic characteristics, thereby creating, in the first part of the gastrointestinal tract a mechanical barrier action against the adhesion of Escherichia coli and other pathogens to the mucosa of the organ, thus reducing the translocation thereof through the intestinal wall and the subsequent risk of infection of adjacent organs, among which mainly the bladder. Such a barrier effect is completed and extended throughout the gastro-intestinal tract by the presence of exopolysaccharides (EPS), produced in situ by the microorganism Streptococcus thermophilus ST10, which thereby enhance the viscosity of the surrounding environment through a self-regulated, and exclusively mechanical mechanism. The ingestion of the above cited bacterium carries in the human intestine a source of molecules with gelling activity, thus exerting an action totally complementary to that of tara gum.

The above-cited muco-adhesive gelling complex has an innovative property which has to be taken into account: tara gum, like all the gums of plant origin, is progressively degraded by the resident microbiota during its intestinal transit, thereby progressively reducing its gelling power of mechanical hindrance. The gradual reduction of the plant gum action is effectively counterbalanced by the gradual increase of exopolysaccharide (EPS) release in the intestinal lumen by the bacterial strain ST10, which exerts its property mainly in ileum and colon. The synergistic combination of tara gum and exopolysaccharides (EPS) thereby ensures the presence of gelling molecules throughout the gastro-intestinal tract, maximizing and optimizing the mechanical barrier action of the product. The presence, production and retention of the hydrophilic gel in the lumen of the organ can, therefore, be considered for the first time really complete, with a first area wherein the plant gum action is maximum and a second area wherein the exopolysaccharide (EPS) action is maximum.

The two microorganisms Lactobacillus plantarum LP01 (LMG P-21021) (for example 2.5 billions/daily dose) and Lactobacillus paracasei LPC09 (DSM 24243) (for example 1 billion/daily dose), mediate an enhancement of the barrier effect established by the muco-adhesive gelling complex comprised of tara gum and exopolysaccharides (EPS), by a barrier-type action against E. coli even at intestinal level. The Applicant carried out a selection of microorganisms with a marked barrier-type action against potential Gram-negative pathogens, with particular reference to the species Escherichia coli, the main role of which in cystitis has been well demonstrated. In addition to the 4 strains of E. coli deriving from the ATCC Collection, the barrier action was also quantified against the enterohemorrhagic serotype O157:H7, capable to produce one or more Shiga, and Klebsiella spp., toxins, alone or combined with E. coli. Following to this research activity, the above-cited strain Lactobacillus plantarum LP01 was positively selected, which is able to establish a barrier-type action against both E. coli and Klebsiella. Furthermore, the microorganism Lactobacillus paracasei LPC09 is capable to create a barrier effect to oxalates, ensuring the complete tolerability of the Cranberry extract even in subjects particularly sensitive to small concentrations of these potential inflammatory agents of the intestinal and urinary mucosae.

Thus, it can be concluded that the composition primarily acts by establishing a physical-mechanical hindrance capable to reduce the urothelium adhesion of Escherichia coli, which is the main cause of bladder infections and inflammations (cystitis). Furthermore, the presence of the specific muco-adhesive gelling complex comprised of tara gum and exopolysaccharides (EPS) produced in situ by S. thermophilus ST10, as well as of the two microorganisms L. plantarum LP01 and L. paracasei LPC09, mediates an enhancement of the physical-mechanical hindrance mediated by combining Cranberry and D-mannose, with a barrier-type action even at intestinal level against E. coli and of the possible translocation of pathogenic microorganisms through the intestinal wall.

Urinary tract infections (UTI) are known to be the most common bacterial infection in women. Most of the UTI are uncomplicated acute cystitis caused by Escherichia coli (86%). The present in vivo study carried out by the Applicant was conducted for assessing the efficacy of a composition comprising a dry cranberry extract, D-mannose, a gelling complex comprised of exopolysaccharides (EPS) produced by Streptococcus thermophilus ST10 (DSM 25246) and tara gum, as well as the two microorganisms Lactobacillus plantarum LP01 (LMG P-21021) and Lactobacillus paracasei LPC09 (DSM 24243) in women with uncomplicated acute cystitis.

The following composition was tested: 2.5×10⁹ of viable cells of the strain of bacterium Lactobacillus plantarum LMG P-21021 (LP01), 1×10⁹ of viable cells of the strain of bacterium Lactobacillus paracasei DSM 24243 (LPC09) and 1×10⁹ of viable cells of the strain of bacterium S. thermophilus DSM 25246 (ST10) along with 250 mg of tara gum, 500 mg of a Cranberry extract PACs (Naturex SA, Avignon, France) and 250 mg of D-mannose (Hebei Huaxu Pharmaceutical Co., Shijiazhuang, China).

Methods. 33 premenopausal and non-pregnant women diagnosed with uncomplicated acute cystitis were enrolled in a prospective pilot study and completed the treatment protocol. The subjects were instructed to take two doses per day for the first month, than to continue with 1 sachet per day until the sixtieth day. Nitrites and leukocyte esterase through assessment with urine-reactive stick were used as markers of cystitis, with an analysis carried out at the beginning, after 30 and 60 days, and after one month of follow-up. The typical symptoms of UTI, namely dysuria, frequent emptying of small volumes, urinary urgency, suprapubic pain and macroscopic haematuria were scored 0-3 and assessed during each medical examination.

Results. Positive results for the presence of nitrites and leukocyte esterase were respectively detected in 14 and 20 subjects after 30 days and in 9 and 14 women after 60 days (p<0.001). At the end of the follow-up period, positive results for nitrites and leukocyte esterase were recorded only in 4 and 3 of the 24 and 19 subjects (respectively 16.7%, p=0.103; 15.8%, p=0.325) with negative results after 60 days. The typical symptoms of cystitis, specifically, dysuria, frequent emptying, urgency and suprapubic pain were also significantly ameliorated. No significant differences were recorded for the incidence and severity of haematuria in any medical examination.

The present study substantiates the efficacy of the tested composition based on cranberry, D-mannose, an innovative gelling complex and the two microorganisms in significantly ameliorating the annoying symptoms reported by women with acute cystitis.

The present pilot study demonstrates the long-term ability of a combination of dry cranberry extract, D-mannose, a gelling complex comprised of exopolysaccharides (EPS) produced by S. thermophilus ST10 and tara gum as well as the two microorganisms L. plantarum LP01 and L. paracasei LPC09, to significantly ameliorate the annoying symptoms reported by women with acute cystitis. To our knowledge, this is the first study which assesses the efficacy of a combination of lactobacilli with a dry cranberry extract in women with uncomplicated acute cystitis. A relatively low number of relapses was recorded during the first month of follow-up according to the considered parameters, thus suggesting the long-term barrier effect exerted by the product. The acceptance and global tolerability profile were very good, since only two exclusions were recorded during the first and second months of treatment due to a deviation from the protocol and no significant negative events occurred. Cranberry (Vaccinium macrocarpon extract) and D-mannose have both an efficacy in hindering, also mechanically, the adhesion of strains of E. coli to the urothelium, the epithelium lining most of the urinary tract. This test can represent a natural tool intended for progressively reducing the severity of a cystitis, thus contributing in alleviating the related symptoms. In any case, cranberries have a relatively high content of oxalic acid, a substance which should be avoided by individuals with a tendency to form calcium oxalate renal stones. The strain L. paracasei LPC09 is effectively able to metabolize oxalates in vitro, thus providing a potential protection against the risk of intestinal inflammation deriving from a prolonged supplementation with a dry cranberry extract.

The gelling complex comprising tara gum and S. thermophilus ST10 is able to prolong the mechanical barrier effect usually ensured by the gum throughout the intestine, thus protecting the organism against a possible onset or maintenance of a low-level chronic inflammatory condition.

In the present study, a test with a urine-reactive stick was used together with the assessment of the symptoms for diagnosing UTI and quantifying the efficacy of the tested composition. The convenience and inexpensiveness of the assessment with a urine-reactive stick, allowed it to be a common diagnostic tool, and represents a suitable option to urine analysis and urine microscopy for diagnosing uncomplicated acute cystitis. Furthermore, it is known that the combination of the positive results obtained with reactive stick, in particular nitrite test, with the symptoms, increases the post-test probability of UTI. In particular, the presence of nitrites and leukocyte esterase in urine samples were considered as prominent factors for confirming (both positive) and excluding (both negative) an UTI. In fact, a reactive stick positive for leukocyte esterase or nitrite and negative for the other one, provides a non-definitive diagnostic information and in these patients is thus needed a further assessment.

Usually, no nitrite is detectable in the urine. Many enteric Gram-negative bacteria such as coliforms are able to synthetizing nitrite, thereby allowing the detection of their presence by means of a simple test. On the other hand, a leukocyte increase indicates pyuria and it is detected in almost all the renal and urinary tract diseases. Leukocyte esterase is a reliable marker for leukocytes in the urine. Urine cultures are recommended only for patients with suspected acute pyelonephritis, patients with symptoms without resolution or with relapse within from two to four weeks after the completion of the treatment and patients with atypical symptoms.

A simultaneous reduction of the incidence of positive results for nitrites and leukocyte esterase and the severity of the UTI symptoms was recorded, with particular reference to dysuria, frequent emptying, urgency and suprapubic pain. It has to be noted that haematuria maintained almost unchanged throughout the study, probably because a longer period is required for obtaining the urothelium healing and becoming clinically obvious.

In any case, the results obtained from the present study are positive and encouraging.

Example of composition No. 1 (dose 2325 mg) in sachet granules:

Ingredients

-   -   Cranberry extract (Cranberry PACran®) 250 mg/dose     -   D-Mannose 250 mg     -   Lactobacillus plantarum LP01 (LMG P-21021) 125 mg (2.5×10⁹         CFU/dose)     -   Lactobacillus paracasei LPC09 (DSM 24243) 50 mg (1×10⁹ CFU/dose)     -   Short chain fructo-oligosaccharides FOS sc 1250 mg/dose         Excipients (400 mg/dose)         Natural flavor cranberry; anti-caking agent: silicon dioxide;         black carrot anthocyanins; sucralose.

Example of composition No. 2 (dose 2575 mg) in sachet granules:

Ingredients

-   -   Cranberry extract (Cranberry PACran®) 250 mg/dose     -   D-Mannose 250 mg     -   Lactobacillus plantarum LP01 (LMG P-21021) 125 mg (2.5×10⁹         CFU/dose)     -   Lactobacillus paracasei LPC09 (DSM 24243) 50 mg (1×10⁹ CFU/dose)     -   Short chain fructo-oligosaccharides—FOSsc 1250 mg/dose     -   guar gum 250 mg/dose         Excipients (400 mg/dose)         Natural flavor cranberry; anti-caking agent: silicon dioxide;         black carrot anthocyanins; sucralose.

Example of composition No. 3 (dose 2575 mg) in sachet granules:

Ingredients

-   -   Cranberry extract (Cranberry PACran®) 500 mg/dose     -   D-Mannose 250 mg     -   Lactobacillus plantarum LP01 (LMG P-21021) 125 mg (2.5×10⁹         CFU/dose)     -   Lactobacillus paracasei LPC09 (DSM 24243) 50 mg (1×10⁹ CFU/dose)     -   Short chain fructo-oligosaccharides FOSsc 1250 mg/dose         Excipients (400 mg/dose)         Natural flavor cranberry; anti-caking agent: silicon dioxide;         black carrot anthocyanins; sucralose.

Example of composition No. 4 (dose 2825 mg) in sachet granules:

Ingredients

-   -   Cranberry extract (Cranberry PACran®) 500 mg/dose     -   D-Mannose 250 mg     -   Lactobacillus plantarum LP01 (LMG P-21021) 125 mg (2.5×10⁹         CFU/dose)     -   Lactobacillus paracasei LPC09 (DSM 24243) 50 mg (1×10⁹ CFU/dose)     -   Short chain fructo-oligosaccharides FOSsc 1250 mg/dose     -   guar gum 250 mg/dose         Excipients (400 mg/dose)         Natural flavor cranberry; anti-caking agent: silicon dioxide;         black carrot anthocyanins; sucralose.

Examples of composition (5-8) correspond to compositions (1-4) wherein the strain of bacteria Lactobacillus plantarum LP01 (LMG P-21021) is replaced by the strain of bacteria Lactobacillus plantarum LP02 (LMG P-21020) and the strain of bacteria Lactobacillus paracasei LPC09 (DSM 24243) is replaced by the strain of bacteria Lactobacillus acidophilus DSM 21717 -LA02.

The composition of the present invention can be in solid form, for oral use, as tablet, capsule, granules or powder.

The compositions the present invention, for example in the form of granules for oral use in sachet, have a shelf-life of at least 3.5×10⁹ viable cells at 24 months and at 25° C. It is recommended to take 2 sachets per day during the first 4 weeks, than to continue, for maintenance purposes, with 1 sachet per day over even long periods. The compositions of the present invention are well tolerated by the organism and thus allow a continuous and prolonged use over the time without side effects.

Cytokines with Immunoregulatory Action

This study assessed the induction of cytokines IL-4 and IL-10, which represent the main cytokines with immunoregulatory action. As can be seen in figure A, the tested strains of bacteria Lactobacillus plantarum LMG P-21021 -LP01 and Lactobacillus plantarum LMG P-21020 -LP02 are able to inducing a statistically significant growth relative to the basal conditions in both the cytokines.

FIG. 1 relates to the quantification of E. coli (ATCC 8739, ATCC 10536, ATCC 35218, ATCC 25922) inhibition by the strain Lactobacillus plantarum LMG P-21021 -LP01.

FIG. 2 shows cytokine profile. Mean±S.E.M. of 10 independent experiments. The statistical meaning is calculated by using the Student's t-test. When it is calculated relative to the basal conditions (non-stimulated PBMC), the values p<0.05 are considered statistically significant. The IL-10 production was assessed in the culture supernatant after one day from stimulation. The IL-4 production was assessed in the culture supernatant after five days of stimulation. Similar results were obtained with the strain Lactobacillus plantarum LMG P-21020 -LP02.

FIG. 3 relates to the quantification of E. coli (ATCC 8739, ATCC 10536, ATCC 35218, ATCC 25922) inhibition by the strain Lactobacillus plantarum LMG P-21020 -LP02. 

1. A method to treat bacterial infections caused by E. coli and/or related inflammations of the urinary tract and/or bladder in a subject, the method comprising: administering to the subject an effective amount of a composition comprising a mixture of bacteria, which comprises: a bacterial strain Lactobacillus plantarum LMG P-21020 (LP02); and at least a strain of bacteria selected from the group comprising the strain Lactobacillus paracasei DSM 24243 (LPC09), the strain Lactobacillus gasseri DSM 18299 (LGS01), the strain Lactobacillus gasseri DSM 18300 (LGS02), the strain Lactobacillus acidophilus DSM 24303 (LA07) and the strain Lactobacillus acidophilus DSM 21717 (LA02).
 2. The method according to claim 1, wherein said mixture of bacteria further comprises Lactobacillus plantarum LMG P-21021 (LP01).
 3. The method according to claim 1, wherein said mixture of bacteria comprises Lactobacillus plantarum LMG P-21020 (LP02) and Lactobacillus acidophilus DSM 21717 (LA02).
 4. The method according to claim 1, wherein the infection and/or inflammation is cystitis.
 5. The method according to claim 4, wherein the cystitis is recurrent cystitis or uncomplicated acute cystitis.
 6. The method according to claim 1, wherein said composition further comprises a cranberry extract and/or a D-mannose.
 7. The method according to claim 1, wherein said composition further comprises a plant gum and/or a plant gelatin.
 8. The method according to claim 1, wherein said composition further comprises a fiber with prebiotic activity selected from inulin, fructo-oligosaccharides (FOS), galacto- and trans-galacto-oligosaccharides (GOS and TOS), gluco-oligosaccharides (GOSα), xylo-oligosaccharides, (XOS), chitosan-oligosaccharides (COS), soy-oligosaccharides (SOS), isomalto-oligosaccharides (IMOS), resistant starch, pectins, psyllium, arabino-galactans, gluco-mannans and galacto-mannans.
 9. (canceled)
 10. The method according to claim 1, wherein said composition comprises: (i) a mixture of bacteria which comprises Lactobacillus plantarum LMG P-21020 (LP02) and Lactobacillus acidophilus DSM 21717 (LA02), (ii) a cranberry extract, a D-mannose and a guar gum, and (iii) a fructo-oligosaccharide—FOS.
 11. (canceled)
 12. The method according to claim 1, wherein Lactobacillus plantarum LMG P-21020 (LP02) and the at least a strain of bacteria are in a weight ratio from 4:1 to 3:1.
 13. The method according to claim 12, wherein the weight ratio is 1:1.
 14. The method according to claim 6, wherein the cranberry extract is a dry cranberry extract.
 15. The method according to claim 7, wherein the plant gum and/or plant gelatin is selected from a tannate or a gelatin tannate, an alginate, a xyloglucan or xylogel, a guar gum, a tara gum, an acacia, carob, oat, bamboo fiber, citrus fruit fibers and glucomannans.
 16. The method according to claim 8, wherein the fiber with prebiotic activity is a short-chain FOS.
 17. The method according to claim 10, wherein the Lactobacillus plantarum LMG P-21020 (LP02) and the Lactobacillus acidophilus DSM 21717 (LA02) are in a weight ratio from 4:1 to 3:1, the cranberry extract, the D-mannose and the guar gum are in a weight ratio of 1:1:1 and the FOS and the cranberry extract are in a weight ratio of 5:1.
 18. The method according to claim 10, further comprising Lactobacillus paracasei DSM 24243 (LPC09).
 19. The method accordingly to claim 18, further comprising Lactobacillus plantarum LMG P-21021 (LP01).
 20. The method accordingly to claim 19, further comprising a muco-adhesive gelling complex comprised of exopolysaccharides (EPS) of bacterial origin produced by Streptococcus thermophilus ST10 DSM 25246 and tara gum.
 21. The method according to claim 17, wherein the Lactobacillus plantarum LMG P-21020 (LP02) and the Lactobacillus acidophilus DSM 21717 (LA02) are in a weight ratio of 1:1. 